Programming the control
signal terminals
09/01 AWB8230-1412GB
62
Restart inhibit USP
If the digital input configured as USP is activated, the restart
inhibit is also activated. This prevents restart of the motor, when
the voltage recovers after a mains fault if a simultaneous start
command (active signal on FWD or REV) is present. Fault message
E13 is issued. By pressing the OFF key or by an active signal on the
RST input, E13 is erased. Alternatively, the start command can be
revoked.
X Program one of the digital inputs 1 to 5 as USP, by inputting the
value 13 under the respective PNU (C01 to C05).
Figure 57: Digital input 1 configured as FWD (start/stop clockwise
rotation) and digital input 3 as USP (restart inhibit).
Figure 58: Function chart for USP (restart inhibit)
U
N
:supply voltage
K14: signalling relay contact K14
f
o
: output frequency
a Revoke start command (alarm no longer present)
b Start command
USP
FWD
P2413
K14
E13
U
N
USP
FWD/REV
a
b
f
O
Warning!
If the restart inhibit has activated (fault message E13) and
this fault message is acknowledged with a reset
command when the start command (input FWD or REV
active) is still active, it is important to note that the motor
will start to run immediately.
h
If you issue a start signal within three seconds of reestab-
lishing the power supply and the restart inhibit is active,
the restart inhibit is also triggered and issues fault
message E13. When the restart inhibit is used, you should
therefore wait for at least 3 seconds before issuing a start
command to the frequency inverter.
h
The restart inhibit can still be executed, after an undervol-
tage fault message (E09) when a reset command is issued
via the RST input.
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